Carbureter.



V. E SCHMIEDEKNECHT.

CARBURETER. APPLICATION. FILED FEB. 7. I914.

Patented Apr. 13, 1915.

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INESLSDS'S:

barren s ra rns rn'rn VICTOR E. SCHMIEDEKNEGET, OF CHICAGO, ILLINOIS.

CARBURETER.

Application filed February 7, 1914.

To all whom it may concern- Be it known that I, VICTOR E. SGHMIEDE- KNECI-IT, a citizen of the United States, residing at the city of Chicago, county of Cook, and State of Illinois, have inventeda efiicient in operation.

at well known in the art.

Another object is to provide a carburetor in which the degree of opening of the throttle valve may be increased without increas ing the angular movement of the throttle lever g,

A further object is to provide means whereby the degree of opening of the air and throttle valves may be adjusted independently of the throttle lever and without varying the maximum angular movement of said lever.

lVith the foregoing, and other objects in view which will appear as the nature of the invention is better understood, the invention consists in certain novel features of construction as hereinafter described and claimed, and illustrated in the accompanymg drawing which forms a. part of this specification, in which is set forth an embodiment of this invention, but it is to be understood that changes variations and mod i fications may be resorted to that come within the. scope of the claims appended hereunto.

In the drilwings in which like reference characters indicate like parts in the several views: Figure 1, is a central vertical section,

some parts being in elevation; Fig. 2-, is a section on line XX of Fig. 1, some parts being in plan; Fig. 3, is a bottom view of the carburetor.

Referring to the drawing l indicates the body of the carl'mreter, comprising a cylindrical structure that may be assembled in any suitable manner; -2 a fuel chamber, defined by external and internal walls 3- and i-. Within the fuel chamber is a float that may be of any suitable construction, which through the medium of a lever 8- and a valve "l regulates the admission of fuel through an inlet -S-, and serves to maintain the fuel at a constant level within the chamber after the manner Concentric with the Specification of Letters Eatent.

Patented Apr. 13, 1915.

Serial No. 817,095

float chamber is an inner double Venturi tube -1l having two distinct contractions l2 and 1-3. Said contractions may be integral projections fromthe wall 4, or a separate tube may be inserted. The properties of the Venturi tube are thought to be Well known and to require no extended description, sufiice it to say that the same volume of air will pass through the constriction as through the main portion of the pas- 6 sage, but at an increased speed. Abridgev 9- secured in any suitable manner, to the bottom of the fuel chamber, supports a plurality of concentrically arranged tubes concentrically within the Venturi tube 11. 7

A longitudinal fuel passage 19- through the bridge 9 is in communication with the 'fuel chamber 2, and has openings into theinterior of the tube 14 and into an annular space 1S between the tubes 15, 16 and serves to supply fuel' thereto. Strainers 20 are disposed over the entrances to passage 19. An annular passage 17- isopen at its lower end to the atmosphere, as

is the passage 11. The upper end of the tube let is closed by a plug 2l, through. which is an orifice -22- controlled by a needle valve 23. The upper ends of the tubes 15 and 16 are covered by a cap -2 l-,

a projection 25 from which extends into 35 the passage 17 converting the tube 15 into a Venturi tube, and serving to divert the current of air over the orifice A plurality of radial ducts 26, in the cap 24, permits the egress of fuel from the passage .18 into the air drawn through the passage 11 by the suction of the engine. The nested tubes 14;, 15, 16 with their alternate fuel and air passages form a multiple concentnic, jet arrangement which terminates just below. the center of the lower contraction 13. The body 1 is surmounted by a domed chamber 30 provided with an outlet -31 from which a connection may be run to the engine. Secured in the dome of said chamber and depending therefrom is a tube-32. which depends to the cap 34:. The valve stem 23 extends upward through the tube 32 to the exterior of the chamber 30 and is provided with a thumb nut -33 by 105 means of which it may be adjusted. A

sleeve is adapted to slide on the tube and has secured in tandem thereon two puppet type valves The valve 35 being adapted to seat 'T "T* tllQ1l1pE ISl1 I-' face of the contraction 12, and the valve 36 projections 38v that bear on a transverse lever, of the second class, 39 havm g an 1 opening through which the sleeve3et passes. One end, --'39,- of the lever is supported by an are shaped ledge 40 which extends inward from the wall of the chairmen the v other end ,39" rests on a cam 4l-.

The cam 41 is secured on a shaft '42 which extends exteriorly of the chamber and is provided with a lever -43-, by means of which the cam is actuated. The cam;is mounted transversely of the chamber in' a plane below the lever 39, and at right angles to the mean position thereof. The cam is practically a frustum of a cone and so se cured on the shaft tha tflon'e surface hes in aplane parallel therewith; by this arrangement the lift of the cam varies from a mm):- mum at one end to a maximum at the other.

A vertical shaft journale'd in a hearing 50- in the wall of the chamber is provided on its outer end with a lever, or.

handle 45, and. on its interior end with a crank e6 having a wrist 47 which enters an elongated slot 18-in the lever 39. Bymovin the handle the lever 39 may be shifted, about-the sleeve 3 L as a center, to bring the end 39" to any desired position intermediatethe length of the cam,

the end 39' moving at the same time along the ledge 40. It is to be observed that moving the lever 43 through an angle of prescribed limits, correspondingly moves-the cam 41, and by reasonof the end 39 of the lever 39 resting thereon raises or lowers ifs lever 39 and through medium of the disk 37 imparts vertical movement to the sleeve 34, thus raising or lowering the valves 35, .36, a spring -49 holding the valves seated. By shifting the lever 39 so that the end 39" may be engaged by different points along the lift 53, of the cam -l-1 the opening ofthe valves may be varied with a fixed maximum movement of the throttle lever.

It will be observed that the amount of opening of the throttle and air valves will depend on the position of the lever 39 on the cam. Further that with the cam 'in its inoperative position with the horizontal side presented up the lever 39 may be shifted without affecting the valves, the., degree to which the valve will be opened by operation of the cam, is predetermined by the posi,

tion-of the lever there o:r i ,,as the height of the lift 53"' which"engages the lever varies, but if the cam is in' an operated position,

On the upper end of the sleeve 34: is a .said chamber, 'abriifge secured below said 1,135,211 v v r that is with the lift in a raised position,-any movement of the lever therealong will vary a the opening of the valves. f

It is thought, that from the foregoing de-- scription, the manifold advantages of this invention has been clearly set forthlan'd that those versed in the-art pertaining thereto will readily understand the operation thereof, and be ableto make and usev the same" and I claim;-' v 1. In a carbureter, a fuel chamber, a dollble Venturi tube concentric therein, valves seated on the contractions of .saidtube, means for operating said valves and means 30 operable to predetermine the amount said. valves may be opened, or for'varying the opening after the valves are opened; y v In a carburetor, a fuel chamber, adouble Venturi tube; concentric withinsaid chamber,-a fuel jet centrally. positioned within said tube, a concentric multiple jet spaced from said centraljet, said jets hava V lnair passages s rroundmgthemya valve r controlling said passages, means for operating said valve and means for predetermin ing the amount said valve maybe opened.

A carbureter having a vertical passage, valves seated insaid passage, means for'opcrating said valves, and means operable either previous to said first named means to predetermine the amount said valves maybe opened'or to vary the opening thereoikafter the operation of said firstnamed. means.

4.. In a CHIbUIBtBI-,XL fuelcha'inbenhav ir zg a centrally positioned vertical passage therethroughopen at itslower end to the atmosphere, a plurality of contractions within said passage, a bridge-secured toil lower end of the chamber and having a ion gitudinal fuelpassage connected with the interior of the chamben a pluralit of con centric tubes supportedwithin sai vertical 5 passage by said bridge, certain'of said tubes communicating with said fuel passage.

5. In a-carbureter, a'fuelchamberyhaving. a centrally positioned vvertical passage therethroug'h open at-it's lowerf'e'nd to the, atmosphere, a pluralityqof contractions within said passage, valves seated on "said contractions, and means for operating'sai valves.

j 'T 6. In 'a-carbureter, a fuel: chamber, a double Venturi tube centrally. positioned.with?v in said chamber andop'en'at its lower-fend toa the atmosphere, a'brid e, a plurality oficon--.- centric tubes supporte withinsaid tube by said bridge, saidbridgehaving a. fuel passage in connection withysai'd chani I her and with certain of saidtubes.v j

Ina carburetor, a fuel chamber, a do: ble Venturi-t'ube arranged centrally within chamber, a" plurality of." concentricfytubes supported by said bridge, bridge-ha nseam a fuel passage in communication with said chamber andwith certain of said concentric tubes, another of said tubes and the Venturi tube being open at the lower ends a centrally positioned vertical passage theresaid Venturi-tu'be.

through open at its lower end to the atmosphere, a plurality of contractions within said passage, valves seated on said contractions, means for opening said valves and other means for varying the opening of said valves. I

10. Ina carbureter, a fuel chamber, a mixin chamber above said fuel chamber, a double Venturi-tube extending centrally through the fuel chamber into the. mixing chamber, a bridge, a multiple concentric jet supported by said bridge within said Venturi-tube, a lever in said mixing chamber, a 'valve-stem' depending from the center of said lever, a fulcrum for said lever, a cam on which the power end of the lever rests and valves secured in tandem on said stem, said valves seating on the contractions of 11. In a carbureter, a fuel chamber, a mixing chamber, a double Venturi-tube extendingthrough said fuel chamber and opening into said mixing chamber, a bridge secured beneath said fuel chamber, a plurality of concentric tubes supported by said bridge Within and terminating just short of the first contractionin said Venturi-tube, said communicating with bridge having a fuel passagetherethrough said fuel chamber and vcertain of said concentric tubes, the lower end of another of said tubes and of the Venturi-tubebeing open to the atmosphere, a needle-valve controllii the outlet of fuel from the central of said tubes, a puppet valve controlling the flow of air through the space between the outer'of said tubes and the. Venturi-tube; a main valve and means for operating said valves.

V12.-In a carbureter, a fuel chamberf'af mixing chamber, a tube through said fuel chamber open at its lower end to the atmosphere, valves seated in said tube, means for 7 operating chamber, a pending from said lever said valves secured to the atmosphere passing said valves comprising a lever of the second class positioned in said mixing fulcrum for said lever, a stem deand a ear-.1 for raising said 13, In a carbureter, a fuel chamber, a mixing chamber, a ub'e' open through said fuel a carbureter, a fuellic hamber having at its lower end chamber into said mixing chamber, valve seats in said tube, a lever in said mixing chamber, a stem depending from said lever, valves on saidstem, a fulcrum for said lever, a cam with a fixed maximum angle of movement and a lift of varying height and means for shifting said lever along said cam.

14. In a carbureter, a lever of the second class, a fulcrum for said lever, a stem depending from said lever, valves on said stem, seats for said valves, a cam forrlifting said lever, said cam having a fixed maximum angle of movement, the lift of said cam in- ,creasing from one end to the other, and

creasing in the length thereof, and means for shifting the lever, with the stem as a center, along the length of said cam and along the fulcrum.

16. In a carbureter, a lever of the second class having a central perforation, a valve stem resting on said lever and depending through said perforation, a valve on said stem, :1 seat for said valve, a fulcrum, a cam the lift of which increases progressively in the length thereof, and means for shifting said lever with said stem as a center so that the power end may rest in different positions along said cam thus varying Y the lift of said valve.

17 In a carbureter, a lever of the second class having a central perforation and an elongated aperture near the fulcrum end thereof, a valve stem supported by said lever and depending through said perforation, a fulcrum, a cam, a crank-shaft engaged in said aperture and adapted to shift the con-' tact point of said lever with the cam and fulcrum, a valve on said stem and a seat for said valve.

18. In acarbureter, a lever, a valve stem depending centrally from said lever, a fulcrum, an elongated cam the liftof which increases through its length, a crank-shaft engaged with said lever and adapted to shift same with said stem as a center, a valve on said stem and a seat for said valve.

19, In a carburetor, a fuel chamber, a mixing chamber, a double Venturi-tube extending centrally through said fuel chamber into said mixing chamber, a bridge secured beneath said fuel chamber, a plurality of concentric tubes supported by said bridge and extending within said Venturi-tube and stopping just short of the fii'st contraction therein, said bridge having a fuel passage therethrough communicating with said fuel chamber and with certain of said tubes, the

lower end. of another of said tubes and of the Venturi-tube being open atnthe lower end to the atmosphere, a needle-valve controlling -the outlet of fuel from the central of said tubes, a valve seating on the upper face of the lower contraction controlhng the flow ofair through the Venturi tube, a

10 central perforation and an elongated apertu're, a valve stem depending throughsaid perforation, said valves secured to said stem, an elongated cam, a fulcrum, a crank-shaft engaged in said aperture and adapted to shift said lever. T

VICTOR a SEHMIEDEKNEGHT.

Witnesses: d v

RALPH C. CHESINUT'I, ARTHUR F. NELSON. 

